This philosophical note by Ladislav Hejdánek explores the ontological instability of nothingness and its transition into being. The author posits that nothingness possesses an inherent tendency to fluctuate and transform into "something," a process he identifies with the principium individuationis. Every "something" that emerges from this fluctuation is regarded as a "true being," defined as an integrated whole of a specific event or action. These beings are characterized by a clear temporal structure comprising a beginning, a course, and an end. The conceptual framework highlights the processual nature of reality, where individual entities are not static but rather dynamic events. Just as nothingness tends toward being, every true being is inherently unstable and tends to revert to nothingness. Hejdánek thus links ontology with a profound insight into the nature of time and change, viewing existence as a temporary integration within a continuous movement between emergence and dissolution, providing a concise exposition of his event-based ontology.